NGF mainly binds to two kinds of membrane receptors, usually with high‐affinity receptor tyrosine kinase A (TrkA), regulates downstream signalling pathways, promotes neurotransmitter release, synaptic receptor expression and changes neuroplasticity, and plays an important regulatory role in the survival, growth, differentiation and function of neurons.11 It was reported in IBS patients and visceral hypersensitivity animal models; NGF in serum and colon tissue was significantly higher than that in control group. Here, NGF is linked to irritable bowel syndrome.